Can opener



FIG. 1 is a top plan view of a can opener;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a left elevational view thereof, the right elevational view being a mirror image thereof;

FIG. 5 is a rear elevational view thereof;

FIG. 6 is a perspective view thereof; and,

FIG. 7 is the view shown in FIG. 1 at a large scale.

The broken lines are for environmental purposes only and form no part of the claimed design. 

The ornamental design for a can opener, as shown and described. 